Erigeron coccinus
Spring Mts., NV, May 2006
 

Erigeron divergens
Mojave Desert, Mid Hills, CA
Spjut 3359, May 1973

Erigeron foliosus
Salmon Mts., CA,  July 2005

Erigeron peregrinus

Erigeron philadelphicus
 

Erigeron glaucus
Humboldt Co.: Big Lagoon, CA, 
July 2006

Erigeron sp.
With Echinocereus triglochidiatus
Mojave Desert, Mid Hills, CA
May 1973

Meepagala K. M., G. Sturtz, D. Wise and D. E. Wedge. 2002. Molluscicidal and antifungal activity of Erigeron speciosus steam distillate. Pest Manag. Sci. 58(10):1043–1047. “The steam-distilled fraction of the aerial parts of Erigeron speciosus (Lindl) DC was tested for activity against strawberry plant pathogenic fungi Botrytis cinerea Pers ex Fr, Colletotrichum acutatum Simmonds, C fragariae Brooks, C gloeosporioides (Penz) Penz & Sacc, and the intermediate host snail Planobdella trivolvis that harbors the trematode, Bolbophorus confusus, that infests and causes severe infections in pond-raised catfish in the Mississippi Delta region of the USA. Bioautography on silica TLC plates demonstrated antifungal activity in the steam distillate. Preliminary bioassays of the steam distillate indicated the presence of phytochemicals toxic to P trivolvis. The bioactive compounds methyl 2Z, 8Z-deca-2,8-diene-4,6-diynoate and its 2E, 8E isomer were isolated by bioassay-guided fractionation and chromatographic techniques and identified by 1H NMR spectroscopy.”